How to use dd command to erase the data in disk


 
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Operating Systems AIX How to use dd command to erase the data in disk
# 8  
Old 11-29-2010
Quote:
Originally Posted by Corona688
Shredding perfectly good disks is a waste of hardware and probably a warranty violation. Smilie
I completely agree. Do we not have a contract with an engineering company that everything is guarenteed cleaned/destroyed by them anyway? I don't know.

Any new disk we recieve from the engineers may actually be someone else's, but we always run the formatting utilities through to prove we have a good disk anyway.

If we didn't and was able to find something, I wouldn't know how to go about "selling" it anyway. No point to me, just give me the hardware I neeed and I will just use it.
# 9  
Old 11-29-2010
The absolute most secure way to wipe data off a disk is to run a drill through it two or three times. The data will be 100% unrecoverable.
# 10  
Old 12-09-2010
Apparently, data can still be recovered from media fragments over 0.5 cm, hence why we shred to below this size.

I would expect that you have to quantify what risk the data is and then consider the media before deciding how safe you want to be. Most of our data is:-
  • Within a database (so some scrambling/compression there)
  • Multiple allocations of space shared withint he database (fragmentation)
  • External logical disks formed from virtual slices of 12 disks in a RAID5 set
.... yet, we still shred these disks if any are replaced because we handle personal and financial data. Paranoia? Possibly. Of course this could be fuelled by the manufacturers of the shredders, if one was to be cynical Smilie



Robin
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